document.write( "Question 249504: using the method
\n" ); document.write( "subtitution method to solve simultaneous equations\r
\n" ); document.write( "\n" ); document.write( "x=y-2
\n" ); document.write( "x+y=18
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Algebra.Com's Answer #181710 by tutorcecilia(2152)\"\" \"About 
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x=y-2
\n" ); document.write( "x+y=18
\n" ); document.write( ".
\n" ); document.write( "(y-2)+y=18\r
\n" ); document.write( "\n" ); document.write( "2y-2=18
\n" ); document.write( "2y=18+2
\n" ); document.write( "2y=20
\n" ); document.write( "2y/2=20/2
\n" ); document.write( "y=10
\n" ); document.write( ".
\n" ); document.write( "x=y-2 [substitute y=10]
\n" ); document.write( "x=10-2
\n" ); document.write( "x=8
\n" ); document.write( "check by plugging in the values for x and y .
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